You can create new tags, update values of existing tags, or delete tags associated with a file system.

The following list explains the metered data size for different types of file system objects.

Regular files – the metered data size of a regular file is the logical size of the file rounded to the next 4-KiB increment, except that it may be less for sparse files.

A sparse file is a file to which data is not written to all positions of the file before its logical size is reached. For a sparse file, if the actual storage used is less than the logical size rounded to the next 4-KiB increment, Amazon EFS reports actual storage used as the metered data size.

Directories – the metered data size of a directory is the actual storage used for the directory entries and the data structure that holds them, rounded to the next 4 KiB increment. The metered data size doesn’t include the actual storage used by the file data.

Symbolic links and special files – the metered data size for these objects is always 4 KiB.

File system deletion is a destructive action that you can’t undo. You lose the file system and any data you have in it, and you can’t restore the data. You should always unmount a file system before you delete it.

Mounting File Systems

To mount your EFS file system on your EC2 instance, use the mount helper in the amazon-efs-utils package.

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